Reaction tube



FIG. 1 is a front, top and right side perspective view of a reaction tube showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a cross sectional view taken along line 8-8 in FIG. 2 thereof; and,

FIG. 9 is a cross sectional view taken along line 9-9 in FIG. 2.

The dashed-dot-dashed lines represent the boundary lines of the claimed design.

The broken lines shown in the drawings represent portions of the reaction tube that form no part of the claimed design. 

CLAIM The ornamental design for a reaction tube, as shown and described. 